全文获取类型
收费全文 | 294篇 |
免费 | 3篇 |
国内免费 | 5篇 |
专业分类
安全科学 | 10篇 |
废物处理 | 5篇 |
环保管理 | 48篇 |
综合类 | 56篇 |
基础理论 | 78篇 |
污染及防治 | 79篇 |
评价与监测 | 15篇 |
社会与环境 | 10篇 |
灾害及防治 | 1篇 |
出版年
2021年 | 4篇 |
2020年 | 5篇 |
2019年 | 8篇 |
2018年 | 10篇 |
2017年 | 10篇 |
2016年 | 7篇 |
2015年 | 3篇 |
2014年 | 12篇 |
2013年 | 19篇 |
2012年 | 14篇 |
2011年 | 7篇 |
2010年 | 17篇 |
2009年 | 12篇 |
2008年 | 16篇 |
2007年 | 12篇 |
2006年 | 13篇 |
2005年 | 15篇 |
2004年 | 4篇 |
2003年 | 7篇 |
2002年 | 19篇 |
2001年 | 2篇 |
2000年 | 10篇 |
1999年 | 16篇 |
1998年 | 2篇 |
1996年 | 4篇 |
1995年 | 3篇 |
1994年 | 2篇 |
1993年 | 3篇 |
1988年 | 2篇 |
1987年 | 2篇 |
1984年 | 2篇 |
1980年 | 2篇 |
1979年 | 2篇 |
1977年 | 2篇 |
1975年 | 1篇 |
1973年 | 1篇 |
1971年 | 1篇 |
1970年 | 1篇 |
1969年 | 2篇 |
1968年 | 2篇 |
1966年 | 1篇 |
1963年 | 1篇 |
1962年 | 1篇 |
1960年 | 2篇 |
1959年 | 4篇 |
1958年 | 2篇 |
1957年 | 1篇 |
1955年 | 1篇 |
1954年 | 3篇 |
1952年 | 1篇 |
排序方式: 共有302条查询结果,搜索用时 62 毫秒
131.
Konstantinos C. Makris Dibyendu Sarkar Stephan B.H. Bach 《Environmental pollution (Barking, Essex : 1987)》2009,157(6):1957-1960
Animal wastewater lagoons nearby concentrated animal feeding operations (CAFOs) represent the latest tendency in global animal farming, severely impacting the magnitude of greenhouse gas emissions, including nitrous oxide (N2O). We hypothesized that lagoon wastewater could be supersaturated with N2O as part of incomplete microbial nitrification/denitrification processes, thereby regulating the N2O partitioning in the gaseous phase. The objectives of this study were: (i) to investigate the magnitude of dissolved N2O concentrations in the lagoon; and (ii) to determine the extent to which supersaturation of N2O occurs in wastewater lagoons. Dissolved N2O concentrations in the wastewater samples were high, ranging from 0.4 to 40.5 μg N2O mL−1. Calculated dissolved N2O concentrations from the experimentally measured partition coefficients were much greater than those typically expected in aquatic systems (<∼0.6 μg N2O mL−1). Knowledge of the factors controlling the magnitude of N2O supersaturation could potentially bridge mass balance differences between in situ measurements and global N2O models. 相似文献
132.
Makris KC Salazar J Quazi S Andra SS Sarkar D Bach SB Datta R 《Journal of environmental quality》2008,37(3):963-971
A growing body of literature reports 3-nitro-4-hydroxyphenylarsonic acid (roxarsone) degradation in poultry litter (PL) to the more toxic inorganic arsenic (As). Aluminum-based drinking-water treatment residuals (WTR) present a low-cost amendment technology to reduce As availability in PL, similar to the use of alum to reduce phosphorus availability. Batch experiments investigated the effectiveness of WTR in removing roxarsone and inorganic As species from PL aqueous suspensions. Incubation experiments with WTR-amended PL evaluated the effects of WTR application rates (2.5-15% by weight) and incubation time (up to 32 d) at two incubation temperatures (23 and 35 degrees C) on As availability in PL. Batch PL aqueous experiments showed the high affinity of As(V), As(III), dimethylarsinic acid (DMA), monomethylarsonic acid (MMA), and roxarsone for the WTR. The 10% WTR amendment rate decreased As availability in PL by half of that of the unamended (no WTR) PL-incubated samples. The reduction in dissolved As concentrations during incubation of WTR-amended PL samples was kinetically limited, being complete within 13 d. Parallel reductions in roxarsone, As(V), and DMA concentrations were observed with liquid chromatography-inductively coupled plasma mass spectrometry, whereas As(III) and MMA concentrations were always <5% of dissolved As. Incubation temperature did not significantly (p > 0.05) influence dissolved As concentrations in the WTR-amended PL. Potential formation of a copper-containing roxarsone metabolite was considered in PL aqueous suspensions with the aid of electrospray mass spectrometry. Further experiments in the field are necessary to ensure that sorbed As is stable in WTR-amended PL. 相似文献
133.
Refuge sharing by otherwise solitary individuals during periods of inactivity is an integral part of social behaviour and
has been suggested to be the precursor to more complex social behaviour. We compared social association patterns of active
versus inactive sheltering individuals in the social Australian sleepy lizard, Tiliqua rugosa, to empirically test the hypothesis that refuge sharing facilitates social associations while individuals are active. We
fitted 18 neighbouring lizards with Global Positioning System (GPS) recorders to continuously monitor social associations
among all individuals, based on location records taken every 10 min for 3 months. Based on these spatial data, we constructed
three weighted, undirected social networks. Two networks were based on empirical association data (one for active and one
for inactive lizards in their refuges), and a third null model network was based on hypothetical random refuge sharing. We
found patterns opposite to the predictions of our hypothesis. Most importantly, association strength was higher in active
than in inactive sheltering lizards. That is, individual lizards were more likely to associate with other lizards while active
than while inactive and in shelters. Thus, refuge sharing did not lead to increased frequencies of social associations while
lizards were active, and we did not find any evidence that refuge sharing was a precursor to sleepy lizard social behaviour.
Our study of an unusually social reptile provides both quantitative data on the relationship between refuge sharing and social
associations during periods of activity and further insights into the evolution of social behaviour in vertebrates. 相似文献
134.
M. D. Moffett A. McLachlan P. E. D. Winter A. M. C. De Ruyck 《Journal of Coastal Conservation》1998,4(1):87-90
The effects of varying intensities of human trampling on sandy beach macrofauna were investigated at an exposed beach on the
Eastern Cape coast. An experimental approach investigated the survival rates of four macrofaunal species which were subjected
to human trampling at different intensities in a holiday-activity simulation. It was found that the clamDonax serra was slightly impacted at all trampling intensities whileDonax sordidus and the isopodEurydice longicomis were affected only at high trampling intensities. Vigorous beach games, such as volleyball, may have a damaging effect onD. serra. In a second experiment, the severe effects of human trampling onD. serra and the benthic mysidGastrosaccus psammodytes were investigated using numbered animals in enclosures. The results indicated that few members of the macrofauna were damaged
at low trampling intensities but substantial damage occurred under intense trampling. 相似文献
135.
Konstantinos C. Makris Syam S. Andra Dibyendu Sarkar Stephan B.H. Bach 《Environmental pollution (Barking, Essex : 1987)》2009,157(12):3508-3513
Concentrated animal feeding operations around the globe generate large amounts of nitrous oxide (N2O) in the surrounding atmosphere. Liquid animal waste systems have received little attention with respect to N2O emissions. We hypothesized that the solution chemistry of animal waste aqueous suspensions would promote conditions that lead to N2O supersaturation at the liquid/air interface. The concentration of dissolved N2O in poultry litter (PL) aqueous suspensions at 25 °C was 0.36 μg N2O mL−1, at least an order of magnitude greater than that measured in water in equilibrium with ambient air, suggesting N2O supersaturation. There was a nonlinear increase in the N2O Henry constants of PL from 2810 atm/mole fraction at 35 °C to 17 300 atm/mole fraction at 41 °C. The extremely high N2O Henry constants were partially ascribed to N2O complexation with aromatic moieties. Complexed N2O structures were unstable at temperatures > 35 °C, supplying the headspace with additional free N2O concentrations. 相似文献
136.
Speciation of zinc in contaminated soils 总被引:1,自引:0,他引:1
Stephan CH Courchesne F Hendershot WH McGrath SP Chaudri AM Sappin-Didier V Sauvé S 《Environmental pollution (Barking, Essex : 1987)》2008,155(2):208-216
The chemical speciation of zinc in soil solutions is critical to the understanding of its bioavailability and potential toxic effects. We studied the speciation of Zn in soil solution extracts from 66 contaminated soils representative of a wide range of field conditions in both North America and Europe. Within this dataset, we evaluated the links among the dissolved concentrations of zinc and the speciation of Zn(2+), soil solution pH, total soil Zn, dissolved organic matter (DOM), soil organic matter (SOM) and the concentrations of different inorganic anions. The solid-liquid partitioning coefficient (K(d)) for Zn ranged from 17 to 13,100Lkg(-1) soil. The fraction of dissolved Zn bound to DOM varied from 60% to 98% and the soil solution free Zn(2+) varied from 40% to 60% of the labile Zn. Multiple regression equations to predict free Zn(2+), dissolved Zn and the solid-liquid partitioning of Zn are given for potential use in environmental fate modeling and risk assessment. The multiple regressions also highlight some of the most important soil properties controlling the solubility and chemical speciation of zinc in contaminated soils. 相似文献
137.
138.
S Weinbruch T Dirsch K Kandler M Ebert G Heimburger F Hohenwarter 《Journal of environmental monitoring : JEM》2012,14(8):2114-2120
As users of indoor climbing gyms are exposed to high concentrations (PM(10) up to 4000 μg m(-3); PM(2.5) up to 500 μg m(-3)) of hydrated magnesium carbonate hydroxide (magnesia alba), reduction strategies have to be developed. In the present paper, the influence of the use of different kinds of magnesia alba on dust concentrations is investigated. Mass concentrations, number concentrations and size distributions of particles in indoor climbing gyms were determined with an optical particle counter, a synchronized, hybrid ambient real-time particulate monitor and an electrical aerosol spectrometer. PM(10) obtained with these three different techniques generally agreed within 25%. Seven different situations of magnesia alba usage were studied under controlled climbing activities. The use of a suspension of magnesia alba in ethanol (liquid chalk) leads to similar low mass concentrations as the prohibition of magnesia alba. Thus, liquid chalk appears to be a low-budget option to reduce dust concentrations. Magnesia alba pressed into blocks, used as powder or sieved to 2-4 mm diameter, does not lead to significant reduction of the dust concentrations. The same is true for chalk balls (powder enclosed in a sack of porous mesh material). The promotion of this kind of magnesia alba as a means of exposure reduction (as seen in many climbing gyms) is not supported by our results. Particle number concentrations are not influenced by the different kinds of magnesia alba used. The particle size distributions show that the use of magnesia alba predominantly leads to emission of particles with diameters above 1 μm. 相似文献
139.
Sébastien Boillat Elvira Serrano Stephan Rist Fikret Berkes 《Environmental management》2013,51(3):663-678
This paper aims to deepen the search for ecosystem-like concepts in indigenous societies by highlighting the importance of place names used by Quechua indigenous farmers from the central Bolivian Andes. Villagers from two communities in the Tunari Mountain Range were asked to list, describe, map and categorize the places they knew on their community’s territory. Results show that place names capture spatially explicit units which integrate biotic and abiotic nature and humans, and that there is an emphasis on topographic terms, highlighting the importance of geodiversity. Farmers’ perspectives differ from the classical view of ecosystems because they ‘humanize’ places, considering them as living beings with agency. Consequently, they do not make a distinction between natural and cultural heritage. Their perspective of the environment is that of a personalized, dynamic relationship with the elements of the natural world that are perceived as living entities. A practical implication of the findings for sustainable development is that since places names make the links between people and the elements of the landscape, toponymy is a tool for ecosystem management rooted in indigenous knowledge. Because place names refer to holistic units linked with people’s experience and spatially explicit, they can be used as an entry point to implement an intercultural dialogue for more sustainable land management. 相似文献
140.
Accumulation of mercury and methylmercury by mushrooms and earthworms from forest soils 总被引:1,自引:0,他引:1
Rieder SR Brunner I Horvat M Jacobs A Frey B 《Environmental pollution (Barking, Essex : 1987)》2011,159(10):2861-2869
Accumulation of total and methyl-Hg by mushrooms and earthworms was studied in thirty-four natural forest soils strongly varying in soil physico-chemical characteristics. Tissue Hg concentrations of both receptors did hardly correlate with Hg concentrations in soil. Both total and methyl-Hg concentrations in tissues were species-specific and dependent on the ecological groups of receptor. Methyl-Hg was low accounting for less than 5 and 8% of total Hg in tissues of mushrooms and earthworms, respectively, but with four times higher concentrations in earthworms than mushrooms. Total Hg concentrations in mushrooms averaged 0.96 mg Hg kg−1 dw whereas litter decomposing mushrooms showed highest total Hg and methyl-Hg concentrations. Earthworms contained similar Hg concentrations (1.04 mg Hg kg−1 dw) whereas endogeic earthworms accumulated highest amounts of Hg and methyl-Hg. 相似文献